... and so on
+FileHandle and other objects work as well.
+
Use of carpout() is not great for performance, so it is recommended
for debugging purposes or for moderate-use applications. A future
version of this module may delay redirecting STDERR until one of the
Nonfatal errors will still be directed to the log file only (unless redirected
with carpout).
+=head2 Changing the default message
+
+By default, the software error message is followed by a note to
+contact the Webmaster by e-mail with the time and date of the error.
+If this message is not to your liking, you can change it using the
+set_message() routine. This is not imported by default; you should
+import it on the use() line:
+
+ use CGI::Carp qw(fatalsToBrowser set_message);
+ set_message("It's not a bug, it's a feature!");
+
+You may also pass in a code reference in order to create a custom
+error message. At run time, your code will be called with the text
+of the error message that caused the script to die. Example:
+
+ use CGI::Carp qw(fatalsToBrowser set_message);
+ BEGIN {
+ sub handle_errors {
+ my $msg = shift;
+ print "<h1>Oh gosh</h1>";
+ print "Got an error: $msg";
+ }
+ set_message(\&handle_errors);
+ }
+
+In order to correctly intercept compile-time errors, you should call
+set_message() from within a BEGIN{} block.
+
=head1 CHANGE LOG
1.05 carpout() added and minor corrections by Marc Hedlund
1.06 fatalsToBrowser() no longer aborts for fatal errors within
eval() statements.
+1.08 set_message() added and carpout() expanded to allow for FileHandle
+ objects.
+
+1.09 set_message() now allows users to pass a code REFERENCE for
+ really custom error messages. croak and carp are now
+ exported by default. Thanks to Gunther Birznieks for the
+ patches.
+
+1.10 Patch from Chris Dean (ctdean@cogit.com) to allow
+ module to run correctly under mod_perl.
+
=head1 AUTHORS
Lincoln D. Stein <lstein@genome.wi.mit.edu>. Feel free to redistribute
@ISA = qw(Exporter);
@EXPORT = qw(confess croak carp);
-@EXPORT_OK = qw(carpout fatalsToBrowser);
+@EXPORT_OK = qw(carpout fatalsToBrowser wrap set_message);
$main::SIG{__WARN__}=\&CGI::Carp::warn;
$main::SIG{__DIE__}=\&CGI::Carp::die;
-$CGI::Carp::VERSION = '1.06';
+$CGI::Carp::VERSION = '1.10';
+$CGI::Carp::CUSTOM_MSG = undef;
# fancy import routine detects and handles 'errorWrap' specially.
sub import {
my $pkg = shift;
my(%routines);
- grep($routines{$_}++,@_);
- $WRAP++ if $routines{'fatalsToBrowser'};
+ grep($routines{$_}++,@_,@EXPORT);
+ $WRAP++ if $routines{'fatalsToBrowser'} || $routines{'wrap'};
my($oldlevel) = $Exporter::ExportLevel;
$Exporter::ExportLevel = 1;
Exporter::import($pkg,keys %routines);
realwarn $message;
}
+# The mod_perl package Apache::Registry loads CGI programs by calling
+# eval. These evals don't count when looking at the stack backtrace.
+sub _longmess {
+ my $message = Carp::longmess();
+ my $mod_perl = ($ENV{'GATEWAY_INTERFACE'}
+ && $ENV{'GATEWAY_INTERFACE'} =~ /^CGI-Perl\//);
+ $message =~ s,eval[^\n]+Apache/Registry\.pm.*,,s if $mod_perl;
+ return( $message );
+}
+
sub die {
my $message = shift;
my $time = scalar(localtime);
my($file,$line,$id) = id(1);
- return undef if $file=~/^\(eval/;
$message .= " at $file line $line.\n" unless $message=~/\n$/;
- &fatalsToBrowser($message) if $WRAP;
+ &fatalsToBrowser($message) if $WRAP && _longmess() !~ /eval [{\']/m;
my $stamp = stamp;
$message=~s/^/$stamp/gm;
realdie $message;
}
+sub set_message {
+ $CGI::Carp::CUSTOM_MSG = shift;
+ return $CGI::Carp::CUSTOM_MSG;
+}
+
# Avoid generating "subroutine redefined" warnings with the following
# hack:
{
# or a string.
sub carpout {
my($in) = @_;
- $in = $$in if ref($in); # compatability with Marc's method;
- my($no) = fileno($in);
- unless (defined($no)) {
- my($package) = caller;
- my($handle) = $in=~/[':]/ ? $in : "$package\:\:$in";
- $no = fileno($handle);
- }
- die "Invalid filehandle $in\n" unless $no;
+ my($no) = fileno(to_filehandle($in));
+ die "Invalid filehandle $in\n" unless defined $no;
open(SAVEERR, ">&STDERR");
open(STDERR, ">&$no") or
my($msg) = @_;
$msg=~s/>/>/g;
$msg=~s/</</g;
+ $msg=~s/&/&/g;
+ $msg=~s/\"/"/g;
+ my($wm) = $ENV{SERVER_ADMIN} ?
+ qq[the webmaster (<a href="mailto:$ENV{SERVER_ADMIN}">$ENV{SERVER_ADMIN}</a>)] :
+ "this site's webmaster";
+ my ($outer_message) = <<END;
+For help, please send mail to $wm, giving this error message
+and the time and date of the error.
+END
+ ;
print STDOUT "Content-type: text/html\n\n";
+
+ if ($CUSTOM_MSG) {
+ if (ref($CUSTOM_MSG) eq 'CODE') {
+ &$CUSTOM_MSG($msg); # nicer to perl 5.003 users
+ return;
+ } else {
+ $outer_message = $CUSTOM_MSG;
+ }
+ }
+
print STDOUT <<END;
<H1>Software error:</H1>
<CODE>$msg</CODE>
<P>
-Please send mail to this site's webmaster for help.
+$outer_message;
END
+ ;
+}
+
+# Cut and paste from CGI.pm so that we don't have the overhead of
+# always loading the entire CGI module.
+sub to_filehandle {
+ my $thingy = shift;
+ return undef unless $thingy;
+ return $thingy if UNIVERSAL::isa($thingy,'GLOB');
+ return $thingy if UNIVERSAL::isa($thingy,'FileHandle');
+ if (!ref($thingy)) {
+ my $caller = 1;
+ while (my $package = caller($caller++)) {
+ my($tmp) = $thingy=~/[\':]/ ? $thingy : "$package\:\:$thingy";
+ return $tmp if defined(fileno($tmp));
+ }
+ }
+ return undef;
}
1;
projects / p5sagit/p5-mst-13.2.git / blobdiff